Wolfram Eilenberger’s book focuses on a crucial period in the history of 20th-century philosophy—the decade from 1919 to 1929. The author examines the lives and ideas of four outstanding thinkers: Ludwig Wittgenstein, Martin Heidegger, Walter Benjamin, and Ernst Cassirer. This period witnessed a genuine revolution in philosophical thought that shaped the appearance of contemporary philosophy. The book reveals not only the intellectual achievements of these philosophers but also the dramatic circumstances of their lives against the backdrop of turbulent historical events.